so there is always some room for debate on this
You might find a Junior has a standard scale length, I'm quite sure Epiphones do
Just to give you a bit more info, I first encountered this different scale length after I bought my first LP in 1977
I tried to do the intonation on the 1st string and found when I made it correct at the 12th fret it was progressively sharp up to the 22nd fret
Next time I was in the shop I brought this up and thats when it was explained to me that the Gibson has not just a different scale but a different method of fret spacing. One thing that didn't help, I was using 38 to 8 guage strings. I'm sure a set of 52 to 12s would intonate a lot better
So heres a suggestion
Instead of measuring each fret you could just set the intonation to be correct at the 12th fret, on the 1st string using a 9 or 10 guage string (with very low action, with a nice straight neck, with that teeny bit of relief)
Then if its correct at the 22nd fret, it is surely a standard scale
If it is sharp it is likely to be the special Gibson 24 3/4 scale
Regarding that quote from the stewmac website
I see it as just a way of side-stepping the issue because they don't want to get into complicated explanations
On the first guitar I took measurements from, the 12th fret was exactly half of 24 9/16" - not 'about' 24 9/16" and yet the spacings do not match what you get from the standard formula
Here are two clues
The Gibson 1st fret is closer to the nut than a standard 24 9/16" scale
The distance from 1st fret to 22nd fret is more than the standard 24 9/16" scale
Hey I forgot I had this. I was going to make a better diagram but who's got time...
Here is the difference between the standard 24 9/16 and SG scales (I also chucked in the standard 24 3/4)
It is very minimal but it is there
If you only had one or two frets out a tiny bit you would consider them to be outliers
But this diagram shows a consistent slight difference between scales
Anyway as you say there is always going to be debates, and thats because we are never going to hear official word from Gibson (unless they think it will improve sales!!!)
Prostheta
I can understand your frustration (lotsalaughs)
mmm fretless...it would take a lot of practice to put your fingers in the right place when playing chords. But you could aim at "just intonation" which sounds a lot nicer than the tempered system
this picture to me looks like a fanned fret layout;